USB : Overview    USB Facts of Life  

A USB Configuration is a container for one or more Interfaces in a USB peripheral device.

A USB Configuration seems to have been intended to be a kind of “setup” or “operating mode” for the device.

Most devices have only one Configuration, but it’s possible for a device to have more than one. (A device having more than one USB Configuration is called a "Complex" device.) Even so, such a device can only operate in one Configuration at a time.


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